package com.yunhaikeji.api.common;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.impl.client.CloseableHttpClient;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

public class WebUtils {
    /**
     * 获得用户远程地址
     */
    public static String getRemoteIP(HttpServletRequest request) {
        String remoteAddr = request.getHeader("X-Real-IP");
        if (StringUtils.isNotBlank(remoteAddr)) {
            remoteAddr = request.getHeader("X-Forwarded-For");
        } else if (StringUtils.isNotBlank(remoteAddr)) {
            remoteAddr = request.getHeader("Proxy-Client-IP");
        } else if (StringUtils.isNotBlank(remoteAddr)) {
            remoteAddr = request.getHeader("WL-Proxy-Client-IP");
        }
        return remoteAddr != null ? remoteAddr : request.getRemoteAddr();
    }


    // 释放资源
    public static void releaseTheBaby(CloseableHttpClient httpClient, CloseableHttpResponse response) {
        try {
            if (httpClient != null) {
                httpClient.close();
            }
            if (response != null) {
                response.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static long ipToLong(String strIp) {
        long[] ip = new long[4];
        // 先找到IP地址字符串中.的位置
        int position1 = strIp.indexOf(".");
        int position2 = strIp.indexOf(".", position1 + 1);
        int position3 = strIp.indexOf(".", position2 + 1);
        if (position1 == -1) {
            return 0l;
        }
        // 将每个.之间的字符串转换成整型
        ip[0] = Long.parseLong(strIp.substring(0, position1));
        ip[1] = Long.parseLong(strIp.substring(position1 + 1, position2));
        ip[2] = Long.parseLong(strIp.substring(position2 + 1, position3));
        ip[3] = Long.parseLong(strIp.substring(position3 + 1));
        return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];
    }

    // 将十进制整数形式转换成127.0.0.1形式的ip地址
    public static String longToIP(long longIp) {
        StringBuffer sb = new StringBuffer();
        // 直接右移24位
        sb.append((longIp >>> 24));
        sb.append(".");
        // 将高8位置0，然后右移16位
        sb.append(((longIp & 0x00FFFFFF) >>> 16));
        sb.append(".");
        // 将高16位置0，然后右移8位
        sb.append(((longIp & 0x0000FFFF) >>> 8));
        sb.append(".");
        // 将高24位置0
        sb.append((longIp & 0x000000FF));
        return sb.toString();
    }
}
